可以将dojo验证器函数存储到变量中，以便以后调用它

It is possible to store a dojo validator function into a variable to invoke it later

本文关键字：调用 变量 存储 dojo 验证 函数      更新时间：2023-09-26

要自定义dojo NumberTextBox的验证器，dojo ValidationTextBox。。。我需要将默认验证器存储在js上下文中的某个位置，以便以后能够调用它；自定义验证取决于默认验证程序的结果。

这样做是可能的，你能帮我做吗？

非常感谢

代码示例：

var djNumberTextBox1 = dijit.byId('#{id:djNumberTextBox1}');
djNumberTextBox1.validator = function() {
    var valide = true;
//here I'd like to invoke the default (old) validator (something like next line)
//var valide = djNumberTextBox1.validate();//but this causes a too much recursion because validate() references the current function
//customisation depending on the default (old) validator result
var djButton1 = dijit.byId('#{id:djButton1}');
if(!valide){
    djButton1.setDisabled(true);
}else{
    djButton1.setDisabled(false);
}
return valide;};

您可以尝试以下代码吗：

var djNumberTextBox1 = dijit.byId('#{id:djNumberTextBox1}');
// store the validator in _oldValidator
djNumberTextBox1._oldValidator = djNumberTextBox1.validator;
djNumberTextBox1.validator = function() {
    var valide = true;

    // Run the old validator
    valide = djNumberTextBox1._oldValidator();
//customisation depending on the default (old) validator result
var djButton1 = dijit.byId('#{id:djButton1}');
if(!valide){
    djButton1.setDisabled(true);
}else{
    djButton1.setDisabled(false);
}
return valide;};

编辑1：
已将参数传递给验证器函数。

var djNumberTextBox1 = dijit.byId('#{id:djNumberTextBox1}');
// store the validator in _oldValidator
djNumberTextBox1._oldValidator = djNumberTextBox1.validator;
djNumberTextBox1.validator = function(value, constraints) {
    var valide = true;

    // Run the old validator with arguments
    valide = djNumberTextBox1._oldValidator(value, constraints);
//customisation depending on the default (old) validator result
var djButton1 = dijit.byId('#{id:djButton1}');
if(!valide){
    djButton1.setDisabled(true);
}else{
    djButton1.setDisabled(false);
}
return valide;};

编辑2：
我认为对于NumberTextBox调用validate（）。

var djNumberTextBox1 = dijit.byId('#{id:djNumberTextBox1}');
// store the validate in _oldValidate
djNumberTextBox1._oldValidate = djNumberTextBox1.validate;
djNumberTextBox1.validate = function() {
    var valide = true;
    // Run the old validate
    valide = djNumberTextBox1._oldValidate();
//customisation depending on the default (old) validate result
var djButton1 = dijit.byId('#{id:djButton1}');
if(!valide){
    djButton1.setDisabled(true);
}else{
    djButton1.setDisabled(false);
}
return valide;};

是的，您可以使用"单音对象"或当前对象的属性来添加任何用于"验证"的信息，并在需要时从NumberTextBox重新访问该值。

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